Nanimon is an Invader Digimon. Nanimon invaded from an other-dimension Digital World. In the other dimension it's nicknamed "Oyaji" and was kept as a digital pet. It loves alcohol and violence, but once it invaded this Digital World (the details of which are still fuzzy), it Digivolved into the active creature known as Nanimon. Inspired by the survival of the fittest, it threw itself into battle, but its actual power is unknown. Still, Nanimon has made it through many battles and evolved into its Ultimate form.[2]

Digimon Frontier

Digimon World

A wild Nanimon serves as a drifter who plays hide-and-seek with Mameo. Once certain area tasks are completed in Ancient Dino Region, Drill Tunnel, Factorial Town, Ogremon's Fortress and Toy Town, he appears somewhere in each location. First time finding unlocks ten more item slots in the inventory and finding him all five times unlocks another ten slots. Once recruited, he appears in the Item Bank and occasionally battles in the Arena.

A Nanimon partner digivolves from the Sunglasses item, and digivolves into Digitamamon. Nanimon has one of the most unique normal digivolution requirements. Any Rookie must have their happiness and discipline at 0% and the player must scold them.

Digimon World 2

Nanimon digivolve from Gazimon and can digivolve further into Tekkamon. Nanimon is also used by the Blood Knight Commander Damien of Disk Domain.

Digimon World 3

Nanimon appears once as a enemy partner in Asuka Sewers.

Digimon Digital Card Battle

Nanimon first appears at Junk City after you have beaten 'A' or 'Analogman'. He will then appear randomly from city to city after you have beaten him. Defeat him 10 times to obtain a Grand Sevens card and a Nanimon card. He is also the holder of a secret Digi-part.

Digimon World Dawn and Dusk

Nanimon is #179, and is a Champion-level, HPtype-class, Machine-species Digimon with a resistance to the Earth element and weakness to the Water element. Its basic stats are 159 HP, 170 MP, 106 Attack, 95 Defense, 81 Spirit, 70 Speed, and 46 Aptitude. It possesses the Quick 2 and Collector2 traits.

It dwells in the Chip Forest. In Digimon Dusk, he appears in a quest, getting a Kokomon her pink lipstick back from him in "Chip Forest".

Nanimon digivolves from Goblimon. In order to digivolve to Nanimon, your Digimon must be at least level 20, with 28 aptitude and 70% friendship.

Nanimon can DNA Digivolve from Impmon and Solarmon, if the base Digimon is at least level 15, with 220 defense and 24 aptitude. Nanimon can DNA digivolve to Vademon with RedVeggiemon.

Digimon Story: Cyber Sleuth

Nanimon is a Earth Virus Type, Champion level Digimon and uses 6 memory. It digivolves from Elecmon, Gazimon and Goblimon and can digivolve to Meteormon, SuperStarmon and Digitamamon. Its special attack is Poop Dunk and its support skill is Immobility which prevents Stun.